My first two girls delivered exactly 14 days after I started feeling kittens. The last girl I had that delivered, had her babies about 19 days after I started feeling movement. So I'd say your kitty is getting very close.
well we cat because she can't use the litterbox and she doesn't get along with our other cats. she can't get out of our yard because we got it repaired where nothing can go over or under it.
well we got her from the prison. she had 2 litters there. they all went to the staff. then we got her. my mom brought her home when she was about to have her 3rd. we still have 1 kitten he is an inside cat. the others we gave away.
Well you should take her in if there is any way you can do it. She can get pregnant right after she gives birth so to prevent that you need to keep her from going outside. Cats normally automatically know to use the litterbox so you don't really have to worry about that and you can always try and keep her and your other cat seperated.
I agree. Keep her inside, confined to one room, so she doesn't have a chance not to get along with the other cats. I hear that "cat attract" will help her to use the litterbox inside. Or maybe you can try using dirt in the litterbox. These are all suggestions that I've had in the past.
Keep her inside until the kittens are weaned, and then get them all fixed at the same time. You might be able to find a low-cost spay/neuter clinic in your area.